jba Exhaust System 1997 Chevy C1500 2wd - headers - Photo 28102445

6. It doesn't take a rocket scientist to see why the JBA headers improve flow and add power. OE exhaust manifolds can be restrictive for numerous reasons-many times due to emissions equipment and/or noise control. They also need to be inexpensively manufactured in mass quantities. An aftermarket set like ours isn't cheap but will improve performance far above stock with higher quality parts while still meeting emissions regulations.